package com.sky.mapper;

import com.sky.entity.ShoppingCart;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

@Mapper
public interface ShoppingCartMapper {

    /**
     * 插入一批数据
     * @param shoppingCartList
     */
    void insertBatch(List<ShoppingCart> shoppingCartList);

    /**
     * 根据用户id删除购物数据
     * @param userId
     */
    @Delete("delete from shopping_cart where user_id = #{userId}")
    void deleteByUserId(Long userId);


    /**
     * 根据用户id删除购物车数据
     * @param shoppingCart
     */
    @Delete("delete from shopping_cart where user_id = #{userId}")
    void deleteShoppingCart(ShoppingCart shoppingCart);

    /**
     * 展示用户购物车
     * @param shoppingCart
     * @return
     */
    @Select("select * from shopping_cart where user_id = #{userId}")
    List<ShoppingCart> showShoppingCart(ShoppingCart shoppingCart);


    /**
     * 插入
     * @param shoppingCart
     */
    void insert(ShoppingCart shoppingCart);
    /**
     * 查询是否该商品已经在购物车中
     * @param shoppingCart
     * @return
     */
    List<ShoppingCart> list (ShoppingCart shoppingCart);

    /**
     * 更新商品数量
     * @param shoppingCart
     */
    @Update("update shopping_cart set number = #{number} where id = #{id}")
    void updateNumberById(ShoppingCart shoppingCart);
}
